Parents and doctors both wanted the best for Lia, but their ideas about the causes of her illness and its treatment could hardly have been more different. The Hmong see illness and healing as spiritual matters linked to virtually everything in the universe, while the medical community marks a division between body and soul, and concerns itself almost exclusively with the former. Lia's doctors ascribed her seizures to the misfiring of her cerebral neurons; her parents called her illness qaug dab peg - the spirit catches you and you fall down - and ascribed it to the wandering of her soul. The doctors prescribed anticonvulsants; her parents preferred animal sacrifices. The Spirit Catches You and You Fall Down moves from hospital corridors to healing ceremonies, and from the hill country of Laos to the living rooms of Merced, uncovering in its path the complex sources and implications of two dramatically clashing worldviews.